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Optimal Production Management Strategy for Non-timber Forest Products using Portfolio Approach - A case study on major fruit trees -

포트포트폴리오 기법을 이용한 단기소득임산물의 최적 생산관리 전략 - 주요 유실수를 중심으로 -

  • Won, Hyun-Kyu (Warm Temperate and Subtropical Forest Research Center, Korea Forest Research Institute) ;
  • Jeon, Jun-Heon (Department of Forest Economics and Management, Korea Forest Research Institute) ;
  • Lee, Seong-Youn (Department of Forest Economics and Management, Korea Forest Research Institute) ;
  • Joo, Rin-Won (Department of Forest Policy Research, Korea Research Institute)
  • 원현규 (국립산림과학원 난대.아열대산림연구소) ;
  • 전준헌 (국립산림과학원 산림경제경영과) ;
  • 이성연 (국립산림과학원 산림경제경영과) ;
  • 주린원 (국립산림과학원 산림정책연구부)
  • Received : 2015.02.23
  • Accepted : 2015.04.08
  • Published : 2015.06.30

Abstract

This study applied the portfolio approach as a means to provide decision-making information for the establishment of the optimal production plan for non-timber products. The target items of non-timber forest product were Chestnut, Jujube, Walnut and Astringent Persimmon. The data used in this study were the annual report of forestry production cost survey which contains the annual production, annual gross income, and annual product cost from 2008 to 2013. These data were used to calculate the expected return of non-timber forest product. The objective function in the portfolio models was to minimize the expected return volatility, called risk and the constrain was to achieve the minimum expected return rate. Results indicated that the production ratio of the nuts and fruits in 2013 was 7% for Chestnut, 20% for Jujube, 5% for Walnut and 68% for Astringent Persimmon. Furthermore, portfolio presented that the production ratio was 10% for Chestnut, 9% for Jujube, 3% for Walnut and 78% for Astringent Persimmon in the near future. The cause was analyzed due to maintain stable production and income of Astringent Persimmon and Chestnut. Meanwhile, the revenue of Walnuts and Jujube was in great variation with relatively higher revenues.

본 연구는 단기소득임산물에 대한 최적 생산계획을 수립하기 위한 의사결정 정보를 제공하는 수단으로 포트폴리오 기법을 적용하였다. 대상품목은 밤, 대추, 호두, 떫은감이며, 2008년부터 2013년까지 임산물생산비 통계의 생산량, 생산비, 조수입 자료를 이용하였으며 단위당 순수익을 분석하였다. 포트폴리오 모델에서 목적함수는 투자위험을 나타내는 유실수 품목의 수익 변동폭을 최소화하는 것이고, 제약조건은 최소 기대수익률을 달성하는 것이다. 분석결과, 2013년 유실수의 생산비율 밤 7%, 대추 20%, 호두 5%, 떫은감 68%과 비교하여 포트폴리오에서는 미래의 유실수 생산비율을 평균 밤 10%, 대추 9%, 호두 3%, 떫은감 78%로 구성하는 것이 안정적인 소득증대를 위해서 보다 효율적인 것으로 제시되었다. 이러한 원인은 호두와 대추가 순수익이 가장 많았지만 생산량과 수익의 등락폭이 상대적으로 컸고, 떫은감과 밤은 상대적으로 안정된 생산량과 일정한 수익을 유지하고 있기 때문인 것으로 분석되었다.

Keywords

References

  1. Jung, B.H. and Lee, S.Y. 2009. An Analysis of the International Competitiveness in the Non-timber Forest Products in Korea. Journal of Korean Forest Society 98(6): 726-732.
  2. Kim, D.-J. 2002. Price Flexibilities of the Non-timber Forest Products in Korea. Journal of Korean Forest Society 91(4): 465-470.
  3. Kim, E.-G., Jung, B.-H., and Kim, D.-H. 2000. Study on the Distribution Channeks and Farm Marketing System of Non-timber Forest Products. Korean Journal of Forest Economics 8(1): 11-27.
  4. Kang, H.M., Chang, C.S., and Choi, S.I. 2014. Analysis of Standard Income Regarding Cultivation of Non-timber Forest Products - Focused on major and fruits-. Journal of Korean Forest Society 103(3): 490-502. https://doi.org/10.14578/jkfs.2014.103.3.490
  5. Kim, J.-S. and Lee, J.-K. 2007. Selection of Non-timber Forest Products for Regional Specialization - Focused on Gangwon Inland Mountains Area-. Journal of Korean Forest Society 96(4): 432-473.
  6. Korea Forest Service. 2008. Forestry Production Cost Survey Report.
  7. Korea Forest Service. 2009. Forestry Production Cost Survey Report.
  8. Korea Forest Service. 2010. Forestry Production Cost Survey Report.
  9. Korea Forest Service. 2011. Forestry Production Cost Survey Report.
  10. Korea Forest Service. 2012. Forestry Production Cost Survey Report.
  11. Korea Forest Service. 2013. Forestry Production Cost Survey Report.
  12. Korea Forest Service. 2013a. Statistical Yearbook Forestry.
  13. Korea Forest Service. 2013b. The Fifty National Forest Plan (2013-2017).
  14. Lee, K.-I. and Jang, W.-W. 2003. Review on the Policy of Non-timber Forest Products in Korea. Journal of Korean Forest Society 92(4): 367-373.
  15. Levy, F.K. 1978. Portfolios to Satisfy Damage Judgements: A Simple Approach Interfance 9(1): 106-107.
  16. Markowitz, H. 1952. Portfolio Selection. Journal of Finance 7(1): 77-91. https://doi.org/10.1111/j.1540-6261.1952.tb01525.x
  17. Markowitz, H. and A Perold. 1981. Portfolio Analysis With Scenarios and Factors. Journal of Finance 36(2): 871-877. https://doi.org/10.1111/j.1540-6261.1981.tb04889.x
  18. Perruso, L., Weldon, R., and Larkin, S. 2005. Predicting Optimal Targeting Strategies in Multispecies Fisheries - A Portfolio Approach-. Marine Resource Economics 20: 22-45.
  19. Lee, S.-Y., Jeon, J.-H., Won, H.-K., and Lee, J.-M. 2014. Management Efficiency of the Full-time and Part-time Oak Mushroom Farms using DEA models. Journal of Korean Forest Society 103(4): 639-645. https://doi.org/10.14578/jkfs.2014.103.4.639